使用遗传算法优化BP神经网络的权值和阈值。BP神经网络是一种按照误差逆向传播算法训练的多层前馈神经网络，是应用最广泛的神经网络。(Genetic algorithm is used to optimize the weights and thresholds of BP neural network. BP neural network is a kind of multilayer feedforward neural network trained according to the error back propagation algorithm, which is the most widely used neural network.)